Liquid hair dye composition

ABSTRACT

A liquid hair dye composition, comprising components (A) and (B), wherein the content (X) of component (A) in the composition is 1.5 mass % or more and 9.3 mass % or less, the content (Y) of component (B) in the composition is 9 mass % or more and 98.5 mass % or less, and the liquid hair dye composition satisfies the following formula (1) (with the proviso that a liquid hair dye composition which has the content of diol of 50 mass % or more and the content of water of 2 mass % or less is excluded), Y≥10.875X−10.875 (1), (A) an azo dye of the formula (A-1), and (B) a monoalcohol and/or a diol other than alkanolamines.

TECHNICAL FIELD

The present invention relates to a liquid hair dye composition.

BACKGROUND ART

Typical hair dye agents include a two-agent type permanent hair dyeagent containing a first agent containing an alkaline agent and a secondagent containing an oxidizing agent, and a one-agent type semipermanenthair dye agent containing at least one of direct dyes such as an acidicdye, a basic dye and a nitro dye. The direct dyes are widely usedbecause some of them excellently exhibit a vivid color, and variousforms such as liquid, cream, foam and powder exist (see for examplePatent Literatures 1 to 3).

(PTL 1) JP 2005-139155 A

(PTL 2) JP Hei 6-271435 A

(PTL 3) JP 2002-97120 A

SUMMARY OF INVENTION

The present invention provides a liquid hair dye composition comprisingthe following components (A) and (B),

wherein the content (X) of component (A) in the composition is 1.5 mass% or more and 9.3 mass % or less,

the content (Y) of component (B) in the composition is 9 mass % or moreand 98.5 mass % or less, and

the liquid hair dye composition satisfies the following formula (1)(with the proviso that a liquid hair dye composition which has a contentof diol of 50 mass % or more and a content of water of 2 mass % or lessis excluded),Y≥10.875X−10.875  (1),

(A) an azo dye of the following formula (A-1), and

(B) a monoalcohol and/or a diol other than alkanolamines.

DETAILED DESCRIPTION OF THE INVENTION

When a semipermanent hair dye agent as described above is prepared as aliquid composition, some direct dyes can be deposited during storagewhen contained in a high concentration, because they are not solubleenough in water or other solvents. Due to the low concentration of thedirect dyes, hair dyeability can be impaired, or a color obtained as aresult of hair dyeing can be different from an intended one.

As described above, a powder direct dye is known which is storable in anenvironment free from problems (e.g., deposition) caused by lowsolubility and brought into a mixture with a liquid preparation beforeuse. However, mixing a powder hair dye composition sufficiently with aliquid preparation can involve such problems as requiring time, orrequiring a large amount of the liquid preparation which decreases thedye concentration.

Because of this, the development of a liquid hair dye composition freefrom deposition of direct dyes during storage, regardless of containinga high concentration of direct dye, has been hoped for.

The present inventors found that hair can be dyed in two layers eachhaving different hues only by applying the obtained mixture to hair, andfound that an unprecedented effect of hair appearance having hue andcolor tone varying by viewing angle of the hair is exerted, when a hairdye composition containing a specific azo dye is mixed with a two-agenttype permanent hair dye agent using an oxidation dye to dye hair. Assuch, it is also demanded that the liquid hair dye composition describedabove can be suitably applied to the aspect in which a specific azo dyeis contained in a high concentration and the composition is mixed with atwo-agent type permanent hair dye agent.

The present invention relates to a liquid hair dye composition whichexhibits high dyeability even at a low amount because of a highconcentration of direct dyes, and exhibits excellent miscibility withother preparations and thus facilitates color toning because, even ifthe other preparations contain other dyes, the liquid hair dyecomposition does not decrease the concentration of the dyes greatly.

As a result of earnest investigation, the present inventors found that aspecific azo dye could be dissolved in a high concentration withstability by setting a fixed concentration relationship with a specificsolvent, thereby completing the present invention.

Definition

In the present invention, a form of liquid means a state of a substancedetermined as “liquid” by Test for determining whether a material is aliquid or solid based on “ASTM D 4359-90: Standard Test Method forDetermining Whether a Material is a Liquid or Solid.”

(Component (A): Azo Dye)

The liquid hair dye composition of the present invention contains an azodye of the following formula (A-1) (HC Red 18) as a component (A). Theazo dye (A-1) has a pKa of 6.0, and assumes red color by protondissociation.

The content of component (A) in the liquid hair dye composition of thepresent invention is 1.5 mass % or more, preferably 1.6 mass % or more,more preferably 1.7 mass % or more, and further preferably 1.8 mass % ormore from the viewpoint of imparting sufficient hair dyeability even byusing a small amount, and 9.3 mass % or less, preferably 9.0 mass % orless, more preferably 8.5 mass % or less, and further preferably 8.0mass % or less from the viewpoint of storage stability, and consideringeconomical efficiency, further preferably 7.18 mass % or less, furtherpreferably 7.0 mass % or less, further preferably 6.5 mass % or less,further preferably 6.0 mass % or less, further preferably 5.71 mass % orless, and further preferably 5.5 mass % or less.

(Component (B): Solvent)

The liquid hair dye composition of the present invention contains as acomponent (B) a monoalcohol and/or a diol other than alkanolamines.Examples of monoalcohols include a lower alkanol, an aromatic alcohol,and an alkoxyalcohol, and examples of diols include an alkylene glycol,a dialkylene glycol, and polyethylene glycol. More specifically, as themonoalcohol, lower monoalcohols having 2 or 3 carbon atoms such asethanol, 1-propanol and 2-propanol; monocyclic aromatic monoalcoholssuch as benzyl alcohol and 2-benzyloxyethanol; and alkoxy alcohols suchas ethoxyethanol, ethoxy diglycol, and methoxyethanol are preferable,and as the diol, diols having 2 to 6 carbon atoms such as propyleneglycol, 1,3-butanediol and diethylene glycol are preferable. Thecomponent (B) preferably contains one or more selected from lowermonoalcohols having two or three carbon atoms, monocyclic aromaticmonoalcohols and diols having 2 to 6 carbon atoms, more preferably oneor more selected from lower monoalcohols having 2 or 3 carbon atoms anddiols having 2 to 6 carbon atoms, further preferably one or moreselected from ethanol, 1-propanol, 2-propanol, propylene glycol,1,3-butanediol and diethylene glycol, and further preferably one or twoselected from the group consisting of 2-propanol and propylene glycolfrom the viewpoint of imparting good storage stability and leveldyeability.

The content of component (B) in the liquid hair dye composition of thepresent invention is 9 mass % or more, preferably 10 mass % or more,more preferably 12 mass % or more, further preferably 14 mass % or more,further preferably 16 mass % or more, and further preferably 20 mass %or more from the viewpoint of imparting good storage stability anduniform dyeability, and 98.5 mass % or less, preferably 97 mass % orless, more preferably 95 mass % or less, further preferably 93 mass % orless, further preferably 90 mass % or less, and further preferably 85mass % or less from the viewpoint of imparting sufficient hairdyeability.

From the liquid hair dye composition of the present invention, thosewhich have a content of diol of 50 mass % or more and a content of waterof 2 mass % or less are excluded.

It is important that the content (X) of component (A) and the content(Y) of component (B) in the liquid hair dye composition satisfy thefollowing formula (1) from the viewpoint of stably dissolving thecomponent (A),Y≥10.875X−10.875  (1).

It is preferable that the above X and Y satisfy the following formula(1a) and moreover the formula (1b) from the viewpoint of stablydissolving the component (A),Y≥15X−15 (provided that X≤7.18)  (1a), andY≥20X−20 (provided that X≤5.71)  (1b).

(Component (C): Alkaline Agent)

The liquid hair dye composition of the present invention preferablyfurther contains an alkaline agent as a component (C) to impart bothgood storage stability and high hair dyeability. Examples of thealkaline agent include, ammonia and salts thereof; alkanolamines such asmonoethanolamine, isopropanolamine, 2-amino-2-methyl-1-propanol,2-aminobutanol, diethanolamine, triethanolamine, monoethanolmethylamine, monoethanol dimethylamine, diethanol methylamine,monoethanol ethylamine, monoethanol diethylamine, diethanol ethylamine,monoethanol propylamine, monoethanol dipropylamine, diethanolpropylamine, monoethanol butylamine, and diethanol butylamine and saltsthereof; alkali metal hydroxides such as sodium hydroxide and potassiumhydroxide; alkanediamines such as 1,3-propane diamine and salts thereof;carbonates such as sodium carbonate, potassium carbonate and guanidinecarbonate; and hydrogen carbonates such as sodium hydrogen carbonate andpotassium hydrogen carbonate. Among these, alkanolamines and saltsthereof are preferable from the viewpoint of imparting good storagestability and high hair dyeability, monoethanolamine and2-amino-2-methyl-1-propanol are more preferable, and among these,2-amino-2-methyl-1-propanol is preferable. These components (C) can beused individually or two or more components (C) can be used incombination.

The content of component (C) in the liquid hair dye composition of thepresent invention is preferably 0.1 mass % or more, more preferably 0.2mass % or more, further preferably 0.25 mass % or more, and furtherpreferably 0.5 mass % or more from the viewpoint of imparting goodstorage stability, and preferably 15 mass % or less, more preferably12.5 mass % or less, further preferably 10 mass % or less and furtherpreferably 9.0 mass % or less from the viewpoint of inhibiting skinstimulation.

A direct dye other than the component (A) can be also used incombination in the liquid hair dye composition of the present invention.However, it is preferable that the content of component (A) be 1 mass %or more and 100 mass % or less, furthermore 5 mass % or more and 100mass % or less, furthermore 10 mass % or more and 100 mass % or less,and furthermore 20 mass % or more and 100 mass % or less of all dyesfrom the viewpoint of maintaining dyeability by the component (A).

Examples of direct dyes other than the component (A) include anion dyes,cation dyes and neutral dyes. Examples of anion dyes include, Acid Black1, Acid Blue 1, Acid Blue 3, Food Blue No. 2, Food Blue No. 5, Acid Blue7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 6, Acid Orange7, Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27,Acid Red 50, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 88, AcidRed 92, Acid Red 155, Acid Red 180, Acid Violet 9, Acid Violet 43, AcidViolet 49, Acid Yellow 1, Acid Yellow 23, Acid Yellow 3, Food Yellow No.8, Acid Orange 24, Acid Green 25, Solvent Green 7, Solvent Red 73, AcidRed 95, Solvent Red 43, Solvent Red 48, Acid Red 33, Solvent Violet 13,Acid Yellow 73, Food Red No. 17, Food Red No. 1, Food Yellow No. 3, FoodBlue No. 2, Food Black No. 1, Food Black No. 2, Disperse Black 9,Disperse Violet 1, and alkali metal salts thereof (sodium salt andpotassium salt). Examples of cation dyes include, Basic Blue 6, BasicBlue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 99, BasicBrown 4, Basic Brown 16, Basic Brown 17, Natural Brown 7, Basic Green 1,Basic Red 2, Basic Red 12, Basic Red 22, Basic Red 76, Basic Violet 1,Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, BasicYellow 57, Basic Red 51, Basic Yellow 87, Basic Blue 17, and BasicOrange 31. Examples of neutral dyes including nitro dyes include, HCBlue 2, HC Blue 4, HC Blue 5, HC Blue 6, HC Blue 7, HC Blue 8, HC Blue9, HC Blue 10, HC Blue 11, HC Blue 12, HC Blue 13, HC Brown 1, HC Brown2, HC Green 1, HC Orange 1, HC Orange 2, HC Orange 3, HC Orange 5, HCRed BN, HC Red 1, HC Red 3, HC Red 7, HC Red 8, HC Red 9, HC Red 10, HCRed 11, HC Red 13, HC Red 54, HC Red 14, HC Violet BS, HC Violet 1, HCViolet 2, HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow7, HC Yellow 8, HC Yellow 9, HC Yellow 10, HC Yellow 11, HC Yellow 12,HC Yellow 13, HC Yellow 14, HC Yellow 15,2-amino-6-chloro-4-nitrophenol, picramic acid,1,2-diamino-4-nitrobenzene, 1,4-diamino-2-nitrobenzene,3-nitro-4-aminophenol, 1-hydroxy-2-amino-3-nitrobenzene,2-hydroxyethylpicramic acid, 3-nitro-p-hydroxyethylaminophenol,4-hydroxypropylamino-3-nitrophenol, andN,N-bis(2-hydroxyethyl)-2′-nitro-p-phenylenediamine.

The liquid hair dye composition of the present invention can furthercontain a solvent other than the component (B). Examples of solventsother than the component (B) include, water; at least trivalent polyolssuch as glycerin; N-alkylpyrrolidones such as N-methylpyrrolidone andN-ethylpyrrolidone; alkylene carbonates such as propylene carbonate; andlactones such as γ-valerolactone and γ-caprolactone. Among these, wateris preferable from the viewpoint of miscibility with other agents andeconomical efficiency. When the liquid hair dye composition contains asolvent other than a component (B) and water, the solvent is preferablyfrom 0 to 30 mass %, more preferably from 0 to 20 mass %, and furtherpreferably from 0 to 10 mass % in the liquid hair dye composition, andthe rest is preferably balanced by water.

(Surfactant)

The liquid hair dye composition of the present invention can furthercontain an anionic surfactant, a nonionic surfactant, an amphotericsurfactant and/or a cationic surfactant from the viewpoint ofmiscibility with other agents and storage stability. Cationicsurfactants have the same advantages as other surfactants, andsimultaneously also contribute as a conditioning component.

Examples of anionic surfactants include sulfate, sulfonate, carboxylateand phosphate type anionic surfactants. More specifically, C10-18 alkylsulfates and ether sulfates thereof are preferable. As the alkyl ethersulfates, C12-14 alkyl ether sulfates are preferable, and lauryl ethersulfates are more preferable, and among these, one having one to fourethylene oxide group(s) in a molecule is further preferable. Examples ofanionic surfactants also include fatty acid amide sulfates, andlong-chain mono- and dialkyl phosphates. Among these, alkyl sulfates arepreferable, and lauryl sulfate is more preferable.

Examples of nonionic surfactants include long-chain fatty acid mono- anddialkanolamides such as coconut fatty acid mono- or di-ethanolamide,myristic acid mono- or di-ethanolamide, stearic acid mono- ordi-ethanolamide; alkyl polyglucosides having a C8-18 alkyl group and oneto five glucoside unit(s); sorbitan esters such as polyethylene glycolsorbitan stearic acid, palmitic acid, myristic acid and lauric acidester; fatty acid polyglycol esters; a polycondensate of ethylene oxideand propylene oxide commercially available under the trade name of“Pluronic (registered trademark)”; polyoxyethylene alkyl ethers (thenumber of carbons in the alkyl group is preferably from 10 to 22, thenumber of moles added of polyoxyethylene per molecule is preferably fromabout 2.5 to about 100, and more preferably from about 10 to about 30).

Preferable amphoteric surfactants include various known betaines such asalkyl betaines, fatty acid amido alkyl betaines, and sulfobetaines likelaurylhydroxysulfobetaine, long-chain alkyl amino acids such ascocoaminoacetate, cocoaminopropionate, sodium cocoamphopropionate, andsodium cocoamphoacetate.

Examples of suitable cationic surfactants include a mono- ordi-long-chain alkyl quaternary ammonium salt of the following generalformula:

In the formula, R¹ represents a saturated or unsaturated linear orbranched C8-22 alkyl group, or a group of R⁵CONH(CH₂)_(n)— orR⁵COO(CH₂)_(n)— (R⁵ represents a saturated or unsaturated linear orbranched C7-21 alkyl group, and n represents a number of from 1 to 4),

R² represents a hydrogen atom, a saturated or unsaturated linear orbranched C1-22 alkyl group, or a group of the R⁵CONH(CH₂)_(n)— orR⁵COO(CH₂)_(n)—,

R³ and R⁴ independently represent a hydrogen atom or a C1-4 lower alkylgroup, and

X represents a chloride ion, a bromide ion or a methosulfate ion.

Specific examples of the above cationic surfactant include, cetrimoniumchloride, steartrimonium chloride, behentrimonium chloride, dipalmitoyldimonium chloride, distearyl dimonium chloride, stearamidopropyltrimonium chloride, dioleoylethyl dimonium methosulfate, anddioleoylethylhydroxyethylmonium methosulfate.

The content of surfactant in the liquid hair dye composition of thepresent invention is preferably 0.1 mass % or more, more preferably 0.2mass % or more, and further preferably 0.3 mass % or more from theviewpoint of imparting good storage stability, and preferably 5 mass %or less, more preferably 4 mass % or less and further preferably 2.5mass % or less from the viewpoint of imparting good hair dyeability.

(Thickening Agent)

The liquid hair dye composition of the present invention can furthercontain, as a thickening agent, a synthetic polymeric compound, asemisynthetic polymeric compound or a natural polymeric compound fromthe viewpoint of imparting good miscibility with other agents. Examplesof synthetic polymeric compounds, semisynthetic polymeric compounds andnatural polymeric compounds include,(vinylpyrrolidone/dimethylaminoethyl methacrylate) copolymers (e.g.,Copolymer 845, Copolymer 937, Copolymer 958; ISP Japan Ltd.),methylcellulose (e.g., METOLOSE SM; Shin-Etsu Chemical Co., Ltd.), ethylcellulose (e.g., EMULFREE CBG; IKEDA CORPORATION), hydroxyethylcellulose (e.g., CELLOSIZE QP4400H, QP52000H; Dow Chemical Japan, Ltd.,SE-600, SE-850; Daicel Corporation), hydroxypropyl cellulose (e.g.,NISSO HPC-H, HPC-M; Nippon Soda Co., Ltd.), hydroxypropyl xanthan gum(e.g., Rhaball Gum EX; Sumitomo Dainippon Pharma Co., Ltd.), pullulan(e.g., Pullulan PF-20, Pullulan PI-20; Hayashibara Co., Ltd.), andxanthan gum (e.g., Echo gum; Sumitomo Dainippon Pharma Co., Ltd.)

These thickening agents can be used individually or two or morethickening agents can be used in combination. The content of thickeningagent in the liquid hair dye composition of the present invention ispreferably 0.05 mass % or more, more preferably 0.1 mass % or more, andfurther preferably 0.5 mass % or more, and preferably 20 mass % or less,more preferably 10 mass % or less, and further preferably 5 mass % orless.

(Conditioning Component)

The liquid hair dye composition of the present invention can contain aconditioning component which is suitably applied to hair. Theconditioning component is usually a polymer or an oil which can bedissolved or dispersed in the liquid hair dye composition, and adheresto hair when treated with a conditioner or diluted with water or ashampoo. Examples of conditioning components include cationic polymers,silicones, higher alcohols and organic conditioning oils.

Cationic Polymer

Cationic polymers mean polymers having a cationic group or a group whichcan be ionized to a cationic group, and also include amphoteric polymerswhich are cationic as a whole. That is, examples of cationic polymersinclude those which have an amino group or an ammonium group on a sidechain of the polymer chain, or which contain a diallyl quaternaryammonium salt as a structural unit, and for example cationizedcellulose, cationic starch, cationized guar gum, a polymer or copolymerof a diallyl quaternary ammonium salt, and quaternizedpolyvinylpyrrolidone. Among these, a polymer containing a diallylquaternary ammonium salt as a structural unit, quaternizedpolyvinylpyrrolidone, and cationized cellulose are preferable, and apolymer or copolymer of a diallyl quaternary ammonium salt andcationized cellulose are more preferable from the viewpoint of softness,smoothness and finger-combability during shampooing, hair manageabilityduring drying, moisture retention, and storage stability of thecomposition.

Specific examples of cationic polymers include, dimethyl diallylammoniumchloride polymers (Polyquaternium-6, for example MERQUAT 100; NalcoJapan Co., Ltd.), dimethyl diallylammonium chloride/acrylic acidcopolymers (Polyquaternium-22, for example MERQUAT 280, MERQUAT 295;Nalco Japan Co., Ltd.), dimethyl diallylammonium chloride/acrylamidecopolymers (Polyquatemium-7, for example MERQUAT 550; Nalco Japan Co.,Ltd.), quaternized polyvinylpyrrolidone (Polyquatemium-11, for exampleGAFQUAT 734, GAFQUAT 755, GAFQUAT 755N; ISP Japan Ltd.), cationizedcellulose (Polyquaternium-10, for example LEOGARD G, LEOGARD GP; LionCorporation, Polymer JR-125, Polymer JR-400, Polymer JR-30M, PolymerLR-400, Polymer LR-30M; the above are from Dow Chemical Japan Ltd.),hydroxyethyl cellulose/dimethyl diallylammonium chloride copolymers(Polyquaternium-4, for example Cellcoat H-100, Cellcoat L-200 (the aboveare from National Starch and Chemical Company).

These cationic polymers can be used individually or two or more cationicpolymers can be used in combination, and the content thereof in theliquid hair dye composition is preferably 0.001 mass % or more, morepreferably 0.01 mass % or more, and further preferably 0.05 mass % ormore from the viewpoint of improving hair touch feel, and the storagestability of the composition, and preferably 20 mass % or less, morepreferably 10 mass % or less, and further preferably 5 mass % or less.

Silicone

Examples of silicones include, dimethylpolysiloxane, modified silicone(e.g., amino-modified silicone, fluorine-modified silicone,alcohol-modified silicone, polyether-modified silicone, epoxy-modifiedsilicone, alkyl-modified silicone, etc.), cyclic dimethylpolysiloxane,and methylphenyl polysiloxane, and dimethylpolysiloxane,polyether-modified silicone and amino-modified silicone are preferable.These silicones may include one which is diluted or dispersed in e.g.,volatile silicone or nonvolatile silicone, and one which is dispersed inwater.

More specifically, examples thereof include, BY11-026, BY22-19, FZ-3125,SH200-1,000,000 cs (Dow Corning Toray Co., Ltd.), TSF451-100MA(Momentive Performance Materials Japan LLC) [the above arepolysiloxanes], TSF4440 (Momentive Performance Materials Japan LLC),KF-6005, KF-6011 (Shin-Etsu Chemical Co., Ltd.) [the above arepolyether-modified silicones], SF8451C, SF8452C, SF8457C, SM8704C (DowCorning Toray Co., Ltd.), KF-867 (Shin-Etsu Chemical Co., Ltd.), SM8904(Dow Corning Toray Co., Ltd.) [the above are amino-modified silicones].

These silicones can be used individually or two or more silicones can beused in combination, and the content thereof in the liquid hair dyecomposition is preferably 0.01 mass % or more, more preferably 0.1 mass% or more, further preferably 1.0 mass % or more, and preferably 20 mass% or less, more preferably 10 mass % or less and further preferably 5mass % or less.

Higher Alcohol

Higher alcohols form a structure with a surfactant to prevent theseparation of a hair dye composition, and moreover have an effect ofimproving a hair touch feel during rinsing. As higher alcohols, thosewhich have 8 to 22 carbon atoms are preferable and those which have 16to 22 carbon atoms are more preferable. Specific examples thereofinclude, cetyl alcohol, stearyl alcohol, and behenyl alcohol, andmixtures thereof.

Higher alcohols can be used individually or two or more higher alcoholscan be used in combination, and the content thereof in the liquid hairdye composition is preferably 0.01 mass % or more, more preferably 0.1mass % or more, and preferably 20 mass % or less, and more preferably 10mass % or less.

Organic Conditioning Oil

The hair dye composition of the present invention preferably contains anorganic conditioning oil to provide an excellent feeling of use. Anorganic conditioning oil which is suitably used as a conditioningcomponent is preferably a liquid which has low viscosity and isinsoluble in water. The viscosity of such organic conditioning oilmeasured at 40° C. is preferably 0.7 mPa·s or more, more preferably 1.0mPa·s or more, and further preferably 2.0 mPa·s or more, and preferably200 mPa·s or less, more preferably 100 mPa·s or less, and furtherpreferably 50 mPa·s or less.

Examples of organic conditioning oils can include hydrocarbon oils,fatty acid esters, and mixtures thereof. The content thereof ispreferably 0.01 mass % or more, more preferably 0.1 mass % or more, andpreferably 20 mass % or less, and more preferably 10 mass % or less.

Hydrocarbon Oil

Examples of hydrocarbon oils include cyclic hydrocarbons, saturated orunsaturated linear aliphatic hydrocarbons, and saturated or unsaturatedbranched aliphatic hydrocarbons, and also include polymers and mixturesthereof. Linear hydrocarbon oils have preferably 12 to 19 carbon atoms.Branched hydrocarbon oils include hydrocarbon polymers, and havepreferably above 19 carbon atoms, and also include polyolefin, which isa synthetic hydrocarbon oil. Examples of the polyolefin includepolyolefin which is liquid at room temperature, more preferably liquidpoly-α-olefin, and most preferably liquid hydrogenated poly-α-olefin.Polyolefin used herein may be prepared by polymerizing an olefin monomerhaving 4 to 14 carbon atoms, preferably 6 to 12 carbon atoms.

Fatty Acid Ester

Examples of fatty acid esters include fatty acid esters having at least10 carbon atoms. Examples of these fatty acid esters include estershaving a hydrocarbon chain derived from a fatty acid and an alcohol(e.g., monoesters, polyalcohol esters, and di- and tri-carboxylic acidesters). The hydrocarbon group in these fatty acid esters may have othercompatible functional groups such as an amido group and an alkoxy groupas a substituent, and may be covalently bound thereto. Morespecifically, alkyl and alkenyl esters of fatty acid having an aliphaticchain having 10 to 22 carbon atoms, aliphatic alcohol-carboxylic acidesters having an aliphatic chain derived from alkyl and/or alkenylalcohol having 10 to 22 carbon atoms, and mixtures thereof are suitablyused.

Specific examples of preferable fatty acid esters include isopropylisostearate, hexyl laurate, isohexyl laurate, isohexyl palmitate,isopropyl palmitate, decyl oleate, isodecyl oleate, hexadecyl stearate,decyl stearate, dihexadecyl adipate, lauryl lactate, myristyl lactate,cetyl lactate, oleyl stearate, oleyl oleate, oleyl myristate, laurylacetate, cetyl propionate, and dioleyl adipate.

(pH)

The pH of the liquid hair dye composition of the present invention ispreferably 7.5 or higher, more preferably 8.0 or higher, furtherpreferably 8.5 or higher, and further preferably 9.0 or higher from theviewpoint of an improvement in hair dyeability, and preferably 12.0 orlower, more preferably 11.5 or lower, and further preferably 11.0 orlower from the viewpoint of inhibiting skin stimulation. In the presentinvention, the pH of the liquid hair dye composition means a value at25° C. when the composition is diluted 10 times by mass with water usinga pH meter (F-51 manufactured by Horiba, Ltd.)

Examples of pH adjustors to adjust a composition to the above pH includeinorganic acids such as hydrochloric acid and phosphoric acid, organicacids such as citric acid, glycolic acid and lactic acid, hydrochloridessuch as ammonium chloride and monoethanolamine hydrochloride, andphosphates such as potassium dihydrogen phosphate and disodium hydrogenphosphate.

(Other Optional Components)

To the liquid hair dye composition of the present invention, othercomponents which are commonly used as cosmetic materials can be furtheradded as long as a stable form of liquid and function as a hair dyeagent are not impaired. Examples of such optional components caninclude, a penetration enhancer, a pearly pigment, an antiseptic agent,a sequestering agent, a stabilizing agent, an antioxidant, anultraviolet absorbing agent, a moisturizing agent, and an odor-controlagent, and specific examples of optional components include a hydrolyzedprotein, a protein derivative, an amino acid, a botanical extract, avitamin, and a perfume.

(Usage)

The liquid hair dye composition of the present invention can be usedindividually per se as a hair dye composition. Because the liquid hairdye composition contains a component (A) serving as a direct dye in ahigh concentration, the composition may be mixed with another liquidpreparation before use and then the mixture can be applied to hair forhair dyeing. Here, examples of “another liquid preparation” include adiluent liquid such as an aqueous solution containing water and analkaline agent, and moreover a shampoo, a conditioner, and a liquid hairdye composition. Examples of this hair dye composition include aone-agent type hair dye composition containing a direct dye, and atwo-agent type hair dye composition containing a first agent containingan alkaline agent and an oxidation dye precursor, and a second agentcontaining an oxidizing agent.

In particular, when the liquid hair dye composition of the presentinvention is mixed with the first agent and second agent of thetwo-agent type hair dye composition, the central part of the section ofhair is dyed with an oxidation dye and the peripheral part of thesection of hair is dyed with a component (A) by applying the obtainedmixed liquid to hair, and consequently hair can be dyed in two hues. Onsuch hair dyed in two hues, a hair dyeing effect which has not been seenuntil now is achieved, in which the hue and color tone of hairappearance vary depending on viewing angle of the hair.

With respect to the embodiments described above, preferable aspects ofthe present invention will now be further disclosed.

<1> A liquid hair dye composition, comprising the following components(A) and (B),

where the content (X) of component (A) in the composition is from 1.5 to9.3 mass %, preferably from 1.6 to 9.0 mass %, more preferably from 1.7to 8.5 mass %, further preferably from 1.8 to 8.0 mass %, furtherpreferably from 1.8 to 7.18 mass %, further preferably from 1.8 to 7.0mass %, further preferably from 1.8 to 6.5 mass %, further preferablyfrom 1.8 to 6.0 mass %, further preferably from 1.8 to 5.71 mass %, andfurther preferably from 1.8 to 5.5 mass %,

the content (Y) of component (B) in the composition is from 9 to 98.5mass %, and

the liquid hair dye composition satisfies the following formula (1)(with the proviso that a liquid hair dye composition which has a contentof diol of 50 mass % or more and a content of water of 2 mass % or lessis excluded),Y≥10.875X−10.875  (1),

(A) an azo dye of the following formula (A-1), and

(B) a monoalcohol and/or a diol other than alkanolamines.

<2> A liquid hair dye composition, comprising the following components(A) and (B), where pH at 25° C. when diluted 10 times by mass with wateris 7.5 or higher and 12.0 or lower,

the content (X) of component (A) in the composition is from 1.5 to 9.3mass %,

the content (Y) of component (B) in the composition is from 9 to 98.5mass %, preferably from 10 to 97 mass %, more preferably from 12 to 95mass %, further preferably from 14 to 93 mass %, further preferably from16 to 90 mass %, and further preferably from 20 to 85 mass %, and

the liquid hair dye composition satisfies the following formula (1)(with the proviso that a liquid hair dye composition which has a contentof diol of 50 mass % or more and a content of water of 2 mass % or lessis excluded),Y≥10.875X−10.875  (1),

-   -   (A) an azo dye of the following formula (A-1), and

(B) a monoalcohol and/or a diol other than alkanolamines.

<3> A liquid hair dye composition, comprising the following components(A) to (C),

where the content (X) of component (A) in the composition is from 1.5 to9.3 mass %,

the content (Y) of component (B) in the composition is from 10 to 97mass %, preferably from 12 to 95 mass %, more preferably from 14 to 93mass %, further preferably from 16 to 90 mass % and further preferablyfrom 20 to 85 mass %, and the liquid hair dye composition satisfies thefollowing formula (1) (with the proviso that a liquid hair dyecomposition which has a content of diol of 50 mass % or more and acontent of water of 2 mass % or less is excluded),Y≥10.875X−10.875  (1),

(A) an azo dye of the following formula (A-1), and

(B) a monoalcohol and/or a diol other than alkanolamines, and

(C) one or more alkaline agents selected from the group consisting of analkanolamine and a salt thereof, ammonia and a salt thereof, analkanediamine and a salt thereof, a carbonate, a hydrogen carbonate andan alkali metal hydroxide.

<4> A liquid hair dye composition, comprising the following components(A) and (B),

where the content (X) of component (A) in the composition is from 1.5 to9.3 mass %,

the content (Y) of component (B) in the composition is from 9 to 98.5mass %, preferably from 10 to 97 mass %, more preferably from 12 to 95mass %, further preferably from 14 to 93 mass %, further preferably from16 to 90 mass % and further preferably from 20 to 85 mass %, and

the liquid hair dye composition satisfies the following formula (1)(with the proviso that a liquid hair dye composition which has a contentof diol of 50 mass % or more and a content of moisture of 2 mass % orless is excluded),Y≥10.875X−10.875  (1),

(A) an azo dye of the following formula (A-1), and

(B) one or more monoalcohols and/or diols selected from the groupconsisting of ethanol, 1-propanol, 2-propanol, benzyl alcohol,2-benzyloxyethanol, ethoxyethanol, ethoxy diglycol, methoxyethanol,propylene glycol, 1,3-butanediol, polyethylene glycol and diethyleneglycol.

<5> A liquid hair dye composition, comprising the following components(A) to (D), where the content (X) of component (A) in the composition isfrom 1.5 to 9.3 mass %,

the total content (Y) of component (B) in the composition is from 10 to97 mass %, preferably from 12 to 95 mass %, more preferably from 14 to93 mass %, further preferably from 16 to 90 mass %, and furtherpreferably from 20 to 85 mass %, and

the liquid hair dye composition satisfies the following formula (1)(with the proviso that a liquid hair dye composition which has a contentof diol of 50 mass % or more and a content of water of 2 mass % or lessis excluded),Y≥10.875X−10.875  (1),

(A) an azo dye of the following formula (A-1),

(B) a monoalcohol and/or a diol other than alkanolamines,

(C) an alkaline agent, and

(D) one or more selected from the group consisting of a surfactant, athickening agent and a conditioning agent.

<6> The liquid hair dye composition according to any one of <1> to <5>,comprising water as a solvent other than the component (B).

<7> A liquid hair dye composition, comprising the following components(A) to (C),

where the content (X) of component (A) in the composition is from 1.5 to9.3 mass %,

the content (Y) of component (B) in the composition is from 10 to 97mass %,

the content of component (C) in the composition is from 0.1 to 15 mass%, and

the liquid hair dye composition satisfies the following formula (1)(with the proviso that a liquid hair dye composition which has a contentof diol of 50 mass % or more and a content of water of 2 mass % or lessis excluded),Y≥10.875X−10.875  (1),

(A) an azo dye of the following formula (A-1),

(B) a monoalcohol and/or a diol other than alkanolamines, and

(C) an alkaline agent.

<8> The liquid hair dye composition according to <7>, where the content(X) of component (A) is from 1.6 to 9.0 mass %.

<9> The liquid hair dye composition according to <7>, where the content(X) of component (A) is from 1.7 to 8.5 mass %.

<10> The liquid hair dye composition according to <7>, where the content(X) of component (A) is from 1.8 to 8.0 mass %.

<11> The liquid hair dye composition according to any one of <7> to<10>, where the content (Y) of component (B) is from 10 to 97 mass %.

<12> The liquid hair dye composition according to any one of <7> to<10>, where the content (Y) of component (B) is from 12 to 95 mass %.

<13> The liquid hair dye composition according to any one of <7> to<10>, where the content (Y) of component (B) is from 14 to 93 mass %.

<14> The liquid hair dye composition according to any one of <7> to<10>, where the content (Y) of component (B) is from 16 to 90 mass %.

<15> The liquid hair dye composition according to any one of <7> to<10>, where the content (Y) of component (B) is from 20 to 85 mass %.

<16> The liquid hair dye composition according to any one of <7> to<15>, where the content of component (C) is from 0.2 to 12.5 mass %.

<17> The liquid hair dye composition according to any one of <7> to<15>, where the content of component (C) is from 0.25 to 10 mass %.

<18> The liquid hair dye composition according to any one of <7> to<15>, where the content of component (C) is from 0.5 to 9.0 mass %.

<19> The liquid hair dye composition according to any one of <7> to<18>, where the component (B) comprises one or more selected from lowermonoalcohols having 2 or 3 carbon atoms, monocyclic aromaticmonoalcohols, and diols having 2 to 6 carbon atoms.

<20> The liquid hair dye composition according to any one of <7> to<18>, where the component (B) comprises one or more selected from lowermonoalcohols having 2 or 3 carbon atoms and diols having 2 to 6 carbonatoms.

<21> The liquid hair dye composition according to any one of <7> to<18>, where the component (B) comprises one or more selected fromethanol, 1-propanol, 2-propanol, propylene glycol, 1,3-butanediol anddiethylene glycol.

<22> The liquid hair dye composition according to any one of <7> to<18>, where the component (B) comprises one or two selected from2-propanol and propylene glycol.

<23> The liquid hair dye composition according to any one of <7> to<22>, where the component (C) comprises an alkanolamine and a saltthereof.

<24> The liquid hair dye composition according to any one of <7> to<22>, where the component (C) comprises one or two selected frommonoethanolamine and 2-amino-2-methyl-1-propanol.

<25> The liquid hair dye composition according to any of <7> to <22>,where the component (C) comprises 2-amino-2-methyl-1-propanol.

<26> The liquid hair dye composition according to any one of <7> to<25>, where pH at 25° C. when diluted 10 times by mass with water is 8.0or higher and 12.0 or lower.

<27> The liquid hair dye composition according to any one of <7> to<25>, where pH at 25° C. when diluted 10 times by mass with water is 8.5or higher and 11.5 or lower.

<28> The liquid hair dye composition according to any one of <7> to<25>, where pH at 25° C. when diluted 10 times by mass with water is 9.0or higher and 11.0 or lower.

<29> A liquid hair dye composition, comprising the following components(A) to (C),

where the content (X) of component (A) in the composition is from 1.6 to9.0 mass %,

the content (Y) of component (B) in the composition is from 20 to 85mass %,

the content of component (C) in the composition is from 0.5 to 9.0 mass%,

pH at 25° C. when diluted 10 times by mass with water is 7.5 or higherand 12.0 or lower, and

the liquid hair dye composition satisfies the following formula (1)(with the proviso that a liquid hair dye composition which has a contentof diol of 50 mass % or more and a content of water of 2 mass % or lessis excluded),Y≥10.875X−10.875  (1),

(A) an azo dye of the following formula (A-1),

(B) a monoalcohol and/or a diol other than alkanolamines, comprising oneor more selected from ethanol, 1-propanol, 2-propanol, propylene glycol,1,3-butanediol and diethylene glycol, and

(C) an alkaline agent comprising one or two selected frommonoethanolamine and 2-amino-2-methyl-1-propanol.

<30> A hair dyeing method for dyeing hair by applying to hair a mixtureobtained after mixing a liquid hair dye composition according to any oneof <7> to <29> and another liquid preparation before use.

<31> The liquid hair dye composition according to <30>, where anotherliquid preparation is a hair dye composition.

<32> The liquid hair dye composition according to <30>, where anotherliquid preparation is a two-agent type hair dye composition comprising afirst agent comprising an alkaline agent and an oxidation dye precursor,and a second agent comprising an oxidizing agent.

EXAMPLES Examples 1 to 9 and Comparative Examples 1 to 10

A concentrated dye liquid composition was prepared by mixing componentsshown in Tables 1 and 2, and the storage stability of each concentrateddye liquid composition was evaluated in accordance with the followingmethod.

(Method for Evaluating Storage Stability of Composition)

A prepared concentrated dye liquid composition was left to stand at 30°C. for 6 days, and then observed visually and microscopically, andstorage stability was evaluated by the following criteria,

A: totally uniformly dissolved, transparent, and no deposits observed,

B: opaque, having fine insoluble matter, and uniformly dispersed, and

C: insoluble matter or deposits observed.

In addition, a first agent and a second agent of an oxidation hair dyeagent having composition shown in Table 3 were prepared. Hair was dyedusing each dye concentrated liquid composition shown in Table 1 and theoxidation hair dye agent in accordance with the following hair dyeingmethod. The miscibility, hair touch feel during rinsing, uniformdyeability, and effect of changing the hue and color tone of hairappearance depending on viewing angle of the hair were evaluated.

<Hair Dyeing Method>

A hair tress with a length of 15 cm and a weight of about 1 g wascreated using white hair purchased from IHIP, and used for evaluation.

In a plastic beaker, 4 g of first agent, 6 g of second agent and 1.25 gof dye concentrated solution were taken, and the obtained mixture wasmixed ten times with a spatula. To evaluation hair, about 1 g of thismixed liquid was applied with a brush, and the hair was left to stand at30° C. for 30 minutes to dye hair. The hair was rinsed with 40° C. hotwater for 30 seconds or more, washed with a shampoo, treated with aconditioner and then dried.

(Method for Evaluating Miscibility of Composition)

A mixed liquid obtained by mixing a first agent, a second agent and adye concentrated solution in the hair dyeing method was observed, andmiscibility was evaluated by criteria described below,

A: easily uniformly mixed, and no insoluble matter observed,

B: uniformly mixed, but requiring time until dissolution, and

C: not uniformly mixed, and insoluble matter observed.

(Method for Evaluating Hair Touch Feel During Rinse)

Hair softness when bent in 40° C. hot water during rinsing was evaluatedin a sensory manner. The softness of a hair tress was evaluated byfeeling resistance when the hair tress is wound around a finger in hotwater. Evaluation was made by five evaluators using untreated hair asthe standard on a scale of 1 to 5 described below, and the average offive expert panelists was shown as a score in Table 1,

1: feeling softer than untreated hair,

2: feeling slightly softer than untreated hair,

3: equal to untreated hair,

4: feeling slightly harder than untreated hair, and

5: feeling harder than untreated hair.

(Method for Evaluating Level Dyeability)

Different three points on dried hair (each one point in the central partof each region obtained by dividing hair into 3 portions in the lengthdirection) were measured using a Chroma Meter (CR-400 manufactured byKonica Minolta, Inc.) by the CIE colorimetric system (L*,a*,b*), and acolor difference (ΔE*) between respective measurement points wascalculated. That is, when respective measurement points were consideredas A, B and C, color differences between A and B, A and C, and B and Cwere calculated. The greatest one of color differences between A and B,A and C, and B and C was evaluated as color unevenness.ΔE*=√{square root over ((L ₁ *−L ₀*)²+(a ₁ *−a ₀*)²+(b ₁ *−b₀*)²)}  [Math.1]

where, L*₀, a*₀ and b*₀ represent values of L*, a* and b*, respectively,on a measurement point, and L*₁, a*₁ and b*₁ represent values of L*, a*and b* of hair immediately after hair dyeing on a point different fromthe above measurement point.

(Method for Evaluating Changes in Hue and Color Tone of Hair AppearanceDepending on Viewing Angle of the Hair)

Dried hair after hair dyeing was observed as a hair tress at a distanceof about 30 cm under an artificial solar lighting manufactured by SericLtd. (model XC-100 AP, 100 W). An evaluator fixed one end of anevaluation hair tress and moved another end to change hair angles, andobserved changes in hair color.

The degree of color changes was evaluated by five evaluators using anon-restrictive close-ended system of a direct evaluation method. Thatis, a 10 cm-long straight line was drawn horizontally and the left andright ends of the straight line were defined as “not feeling colorchanges at all even when changing angles” and “seeing entirely differentcolor depending on viewing angle” respectively. A position, shown in cm,from the left end of the straight line of hair in Examples andComparative Examples was investigated and shown. The average of the fiveevaluators was shown as a score in Table 1.

TABLE 1 Examples Comparative Examples 1 2 3 4 5 6 1 2 3 4 Compo- (A)(A-1) HC Red 18 3.0 5.0 8.0 7.0 7.0 7.0 3.0 0.4 8.0 3.0 sition (B)Propylene glycol 25.0 47.0 78.0 — — — 2.0 7.0 75.0 15.0 (mass %) Ethanol— — — 70.0 — — — — — — 2-Propanol — — — — 70.0 — — — — — Benzyl alcohol— — — — — 70.0 — — — — Alkaline 2-Amino-2-methyl- 4.0 4.0 4.0 4.0 4.04.0 4.0 4.0 4.0 4.0 agent 1-propanol Other Water 68.0 44.0 10.0 19.019.0 19.0 91.0 88.6 13.0 78.0 solvent Total 100.0 100.0 100.0 100.0100.0 100.0 100.0 100.0 100.0 100.0 pH (10-fold diluted with water) 10.69.8 9.4 9.7 9.7 10.0 10.8 11.1 9.3 10.3 Evaluation Storage stability A AA A A B C A C C Miscibility A A A A A A C A C C Hair Touch Feel(softness 1.6 1.4 1.2 1.4 1.2 1.4 4.4 3.0 4.4 3.6 during rinse) Uniformdyeability (ΔE*) 1.1 1.9 1.3 2.4 1.5 1.9 4.1 2.5 16.4 5.2 Changes in hueand color 6.8 7.2 7.5 6.9 7.0 6.3 5.9 3.0 4.3 3.6 tone of hairappearance depending on viewing angle of the hair

TABLE 2 Examples Comparative Examples 7 8 9 5 6 7 8 9 10 Compo- (A)(A-1) HC Red 18 3.0 3.0 3.0 3.0 7.0 3.0 7.0 3.0 7.0 sition (B) Propyleneglycol — — — — — — — — — (mass %) Ethanol 30.0 — — 10.0 30.0 — — — —2-Propanol — 30.0 — — — 10.0 30.0 — — Benzyl alcohol — — 30.0 — — — —10.0 30.0 Alkaline 2-Amino-2-methyl- 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0agent 1-propanol Other Water 63.0 63.0 63.0 83.0 59.0 83.0 59.0 83.059.0 solvent Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0pH (10-fold diluted with water) 10.4 10.4 9.8 10.0 10.4 10.4 10.9 9.79.8 Evaluation Storage stability A A B C C C C C C

TABLE 3 (mass %) First Toluene-2,5-diamine 0.38 agent2,4-Diaminophenoxyethanol hydrochloride 0.53 Ascorbic acid 0.15Anhydrous sodium sulfite 0.20 Aqueous Ammonia (28 mass %) 6.00 EDTA•4Na0.05 Purified water 92.70 Total of first agent 100.00 Second Hydrogenperoxide (35 mass %) 5.80 agent Purified water 94.20 Total of secondagent 100.00

The invention claimed is:
 1. A liquid hair dye composition, comprising:(A) an azo dye of the formula (A-1):

 and (B) at least one selected from the group consisting of a lowermonoalcohol having 2 or 3 carbon atoms, a monocyclic aromaticmonoalcohol, and a diol having 2 to 6 carbon atoms, wherein a content(X) of the component (A) in the composition is from 1.5 mass % to 9.3mass %, a content (Y) of the component (B) in the composition is from 9mass % to 98.5 mass %, and the liquid hair dye composition satisfies theformula (1),Y>10.875X−10.875  (1), with a proviso that the liquid hair dyecomposition is not a composition in which a diol content is 50 mass % ormore and a water content is 2 mass % or less.
 2. The liquid hair dyecomposition according to claim 1, further comprising an alkaline agent.3. The liquid hair dye composition according to claim 2, wherein thealkaline agent is at least one selected from the group consisting of analkanolamine and a salt thereof, ammonia and a salt thereof, an alkanediamine and a salt thereof, a carbonate, a hydrogen carbonate, and analkali metal hydroxide.
 4. The liquid hair dye composition according toclaim 1, wherein a pH at 25° C. when diluted 10 times by mass with wateris from 7.5 to 12.0.
 5. The liquid hair dye composition according toclaim 1, wherein the liquid hair dye composition is suitable for mixingwith another liquid preparation before use.
 6. The liquid hair dyecomposition according to claim 5, wherein the other liquid preparationis a hair dye composition.
 7. The liquid hair dye composition accordingto claim 5, wherein the other liquid preparation is a two-agent hair dyecomposition consisting of a first agent comprising an alkaline agent andan oxidation dye precursor, and a second agent comprising an oxidizingagent.
 8. The liquid hair dye composition according to claim 5, whereinthe other liquid preparation is a multiple-agent hair dye compositioncomprising a first agent comprising an alkaline agent and an oxidationdye precursor, and a second agent comprising an oxidizing agent.
 9. Amethod for dyeing hair, comprising: mixing a liquid hair dye compositioncomprising (A) an azo dye of the following formula (A-1) and (B) atleast one selected from the group consisting of a lower monoalcoholhaving 2 or 3 carbon atoms, a monocyclic aromatic monoalcohol, and adiol having 2 to 6 carbon atoms, with another liquid preparation toprepare a mixture:

 and subsequently applying the mixture to hair for dyeing the hair,wherein a content (X) of the component (A) in the composition is from1.5 mass % to 9.3 mass %, a content (Y) of the component (B) in thecomposition is from 9 mass % to 98.5 mass %, and the liquid hair dyecomposition satisfies the formula (1)Y≥10.875X−10.875  (1), with a proviso that the liquid hair dyecomposition is not a composition in which a diol content is 50 mass % ormore and a water content is 2 mass % or less.
 10. The method accordingto claim 9, wherein the other liquid preparation is a hair dyecomposition.
 11. The method according to claim 9, wherein the otherliquid preparation is a multiple-agent hair dye composition comprising afirst agent comprising an alkaline agent and an oxidation dye precursor,and a second agent comprising an oxidizing agent.
 12. The methodaccording to claim 9, wherein the other liquid preparation is atwo-agent hair dye composition consisting of a first agent comprising analkaline agent and an oxidation dye precursor, and a second agentcomprising an oxidizing agent.
 13. The liquid hair dye compositionaccording to claim 1, wherein the content (X) of the component (A) inthe composition is from 5.5 mass % to 9.3 mass %.
 14. The liquid hairdye composition according to claim 1, wherein the content (Y) of thecomponent (B) in the composition is from 47.0 mass % to 98.5 mass %.